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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "oiyo-calculations": {
      "type": "http",
      "url": "https://api-oiyo.861106.workers.dev/mcp"
    }
  }
}

claude mcp add --transport http oiyo-calculations https://api-oiyo.861106.workers.dev/mcp

[mcp_servers.oiyo-calculations]
url = "https://api-oiyo.861106.workers.dev/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "oiyo-calculations": {
      "type": "remote",
      "url": "https://api-oiyo.861106.workers.dev/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "oiyo-calculations": {
      "type": "http",
      "url": "https://api-oiyo.861106.workers.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=oiyo-calculations&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXBpLW9peW8uODYxMTA2LndvcmtlcnMuZGV2L21jcCJ9"
}

{
  "servers": {
    "oiyo-calculations": {
      "type": "http",
      "url": "https://api-oiyo.861106.workers.dev/mcp"
    }
  }
}

{
  "mcpServers": {
    "oiyo-calculations": {
      "httpUrl": "https://api-oiyo.861106.workers.dev/mcp"
    }
  }
}

extensions:
  "oiyo-calculations":
    enabled: true
    name: "oiyo-calculations"
    type: streamable_http
    uri: "https://api-oiyo.861106.workers.dev/mcp"
    timeout: 300

Quality 94 / 100new

protocol88 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
warn
protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene100 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations26 of 26 tools declare readOnlyHint or destructiveHint
pass
tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
pass
tools.token_costabout 7,367 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump
pass
tools.hidden_textno hidden text in tool names, descriptions, schemas or annotations

stabilityn/a · weight 15

n/a
stability.changes, stability.rug_pull, stability.new_linkstool history recorded for 1 of the 7 days needed

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

26 tools, about 7,367 tokens to load them all · tool set 325dbe5892a4 · checked 2026-11-14 07:03 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 95 / 100

provenance90

liveness94

freshness100

hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-86% +updated-2d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://api-oiyo.861106.workers.dev/mcp` streamable-http	none	yes	86%	227 ms	2026-07-28	2026-11-14
`https://api.oiyo.net/mcp` streamable-http	unknown	no (1 failures)	89%	199 ms	–	2026-11-13

Tools (26)

`calculate_annual_leave`read-only	Calculates statutory annual paid leave days (연차 휴가) and unused leave cash-out allowance by years of service.
`calculate_cagr`read-only	Calculates Compound Annual Growth Rate (CAGR, 연평균 복합 성장률), total ROI, and Rule of 72 milestone.
`calculate_capital_gains_tax`read-only	Calculates South Korea Real Estate Capital Gains Tax with 1-home 1.2 billion KRW exemption, high-value house apportionment, and up to 80% special long-term holding deduction.
`calculate_card_tax_deduction`read-only	Calculates South Korea 2026 year-end card tax deduction, 25% threshold, credit (15%) vs check (30%) rates, and golden ratio strategy.
`calculate_compound_interest`read-only	Simulates compound interest growth with initial principal, annual yield, recurring monthly contributions, and annual balance trajectory.
`calculate_gas_bill`read-only	Calculates South Korea residential city gas invoice amount based on cubic meters used and heating/cooking tariff.
`calculate_health_insurance`read-only	Calculates Korean regional insurance premiums and preliminary income/property flags only. dependentEligibility.isEligible is null: family support, spouse/sibling conditions, housing rental income and statutory exceptions require NHIS review.
`calculate_inheritance_gift_tax`read-only	Calculates South Korea 2026 statutory inheritance and gift tax, progressive tax brackets (10-50%), relationship deductions, and voluntary filing discount.
`calculate_kr_acquisition_tax`read-only	South Korea 2026 housing acquisition tax (주택 취득세) with local education tax and rural special tax: 1-3% standard rate (6-900M KRW sliding formula) or 8%/12% multi-home surcharge. Same formulas as tools.oiyo.net. Returns statute basis; does not judge house counts or first-home relief.
`calculate_kr_freelancer_income_tax`read-only	South Korea freelancer (3.3% withholding, 사업소득) May comprehensive income tax estimate: simple expense rate 940909 (64.1%, 49.7% above 40M KRW) or a given expense ratio, compared with the tax already withheld to show refund or extra payment. Same formulas as tools.oiyo.net. Tax years 2025 and 2026 only; refuses unknown inputs.
`calculate_kr_property_tax`read-only	South Korea 2026 housing property tax (주택 재산세) from the official price: fair market value ratio (43-45% for one-home households, 60% otherwise), one-home special rate up to 900M KRW, urban area tax and local education tax. Same formulas as tools.oiyo.net. Excludes comprehensive real estate holding tax and the burden cap.
`calculate_kr_year_end_settlement`read-only	South Korea 2026 귀속 year-end tax settlement (연말정산) for a resident wage earner: income deductions, card deduction, special deductions/credits vs the 130,000 KRW standard credit (picks the lower tax), refund or extra payment when withheld tax is given. Same formulas as tools.oiyo.net. Refuses unknown inputs and tax years other than 2026; returns statute basis and what is not covered. Estimate, not tax advice.
`calculate_loan_refinance`read-only	Calculates loan refinancing savings, prepayment penalty fees with 3-year sliding taper, and break-even point in months.
`calculate_military_service`read-only	Calculates South Korea mandatory military service duration, completion rate, remaining days, and rank promotion dates.
`calculate_net_salary`read-only	Calculates net monthly take-home salary after the 4 major social insurances (2026 statutory rates) and an ESTIMATED income tax (annualized estimate, not the NTS withholding table) in South Korea.
`calculate_overtime_pay`read-only	Calculates statutory overtime, night, and holiday allowances under Korean Labor Standards Act.
`calculate_saju_astrology`read-only	Computes traditional Korean Sexagenary Cycle (60 Gapja) Four Pillars and Five Elements (오행) balance from birth datetime and solar/lunar calendar.
`calculate_severance_pay`read-only	South Korean statutory severance arithmetic. Unknown or mixed four-week hours return null eligibility and amount; all-period self-confirmation is required for an estimate.
`calculate_unemployment_benefits`read-only	Simulates statutory South Korean unemployment benefits (실업급여) duration, daily benefit rate, and total expected payout.
`calculate_weekly_allowance`read-only	Calculates statutory South Korean weekly holiday allowance (주휴수당) for part-time and hourly workers.
`check_kr_business_day`read-only	Determines if a given date is a South Korea working business day or a public holiday/weekend.
`compare_vat_tax`read-only	Compares South Korea Value-Added Tax (VAT) between General Taxpayer (10% with full deduction/refund) and Simplified Taxpayer (15-40% value-added rate, 48M exemption, no refund).
`convert_units`read-only	Universal deterministic unit conversion for area (pyeong ↔ m², sqft, ha), length, mass, and temperature.
`diagnose_hug_guarantee`read-only	Diagnoses HUG Jeonse Deposit Return Guarantee eligibility (126% rule, 60% senior debt limit, 90% debt ratio limit) and calculates statutory guarantee fee.
`get_kr_holidays`read-only	Get official South Korea public holidays, substitute holidays, and solar terms for a given year.
`get_kr_minimum_wage`read-only	Verified Korean minimum wage by year, effective dates and 8/209-hour examples. Not a 2027 net-salary calculator; uncollected insurance is unavailable.

Schemas: list_tools.

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More from io.github.yuli3

Official server.json

{
  "name": "io.github.yuli3/oiyo-calculations",
  "icons": [
    {
      "src": "https://oiyo.net/icon-512.png",
      "sizes": [
        "512x512"
      ],
      "mimeType": "image/png"
    },
    {
      "src": "https://oiyo.net/icon-192.png",
      "sizes": [
        "192x192"
      ],
      "mimeType": "image/png"
    }
  ],
  "title": "OIYO Korea Calculators",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://api-oiyo.861106.workers.dev/mcp",
      "type": "streamable-http"
    },
    {
      "url": "https://api.oiyo.net/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.3.3",
  "repository": {
    "url": "https://github.com/yuli3/api-oiyo",
    "source": "github"
  },
  "websiteUrl": "https://api.oiyo.net/docs",
  "description": "Korean personal tax, payroll, labor, real estate and calendar calculators. Code, no LLM."
}